Incubus
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Incubus is an unlockable passive item added in The Binding of Isaac: Afterbirth.
Effects
- Spawns a demonic familiar that copies Isaac's tears with reduced size (or width for some special attack).
Incubus' tears ignore Isaac's range and shot speed.
Incubus' damage is reduced by 25% when playing as characters other than 
Lilith and 
Tainted Lilith.
- This item belongs to the
Conjoined set. Collecting three items from this set will transform Isaac into a three-faced version of himself.
Notes
- Lilith's starting Incubus is technically not a collected item but an intrinsic part of the character, and is removed if an item such as
Ankh or 
Clicker are used to become a different character. As such, playing as Lilith will not add Incubus to the collection page, nor does her personal Incubus count towards the Conjoined transformation. - Incubus is one of the familiars that can be spawned by
Cambion Conception. Receiving one in this way does not count towards Conjoined, however. - Incubus has the second-highest priority of following familiars, only being below
King Baby's priority.
Synergies
-
Azazel / 
Brimstone: Fires a full-length Brimstone laser that can be charged while still firing the previous laser, allowing it to fire more rapidly than normal.
- The laser fired by Incubus has the same width as
Lil Brimstone's. - When playing as Azazel, Incubus' Brimstone laser has the same range as him.
- Multiple copies of Brimstone will not grant Incubus the mega brimstone effect.
- The laser fired by Incubus has the same width as
-
Berserk! / 
The Forgotten / 
Spirit Sword: Incubus will carry the respective melee weapon, using it exactly like Isaac. 
BFFS!: Shoots tears that do 2x Isaac's damage 1.5x Isaac's damage. Still deals 2x as Lilith.
Cursed Eye: A burst of 3 tears is fired at the regular tear delay without needing to charge.
- Incubus now charges and fires a burst of up to 5 tears just as Isaac would.
-
Forgotten Lullaby: Doubles the fire rate of Incubus. This notably makes it fire and charge-attack faster than Isaac does. -
Immaculate Heart: Incubus can create its own orbiting tears, which will orbit the Incubus that created it, and not Isaac. -
Technology 2: Incubus can fire the Technology 2 laser too. -
Tractor Beam: The Incubus tears will follow the beam. This makes it seem as if the tears come directly from Isaac, even if blindfolded.
- Tractor Beam +
Monstro's Lung: Also allows the Incubus tears to follow the beam.
Interactions
No effect on Incubus:
-
Bird's Eye 
Cursed Eye-
Epic Fetus -
Evil Eye -
Eye of Greed -
Ghost Pepper -
Large Zit -
Loki's Horns -
Maw Of The Void -
Mom's Eye - R U a Wizard?
Tech.5
Only stat effects are applied; otherwise no effect on Incubus:
Other interactions:
-
Dead Eye: Only Isaac's tears affect the damage multiplier. 
Dr. Fetus: A dangerous combination, since familiars naturally stay behind the character, and the character's movement may block the bomb, which causes self-damage easily.- The Forgotten: Fires bone tears like
Compound Fracture without the splitting effect. Reverts to normal tears when switching to 
The Soul. -
Flat Stone: The effective range of Incubus' tears is roughly doubled, with a single bounce in the middle of the flight. 
Guillotine: Incubus will fire tears in relative position to its body depending on where Isaac's head is currently.-
Isaac's Tears: The item is recharged by Isaac's tears, not Incubus'. This item works with Lilith.
- Incubus' tears contribute to the item charge.
Kidney Stone: Incubus ignores the range down from this item, and will fire the tear barrage but not the stone.
- Incubus is still able to fire tears while Kidney Stone is charging.
-
The Ludovico Technique: Incubus' tears become piercing and spectral but otherwise fires normal tears. -
My Reflection: Since Incubus ignores shot speed the tears turn back very quickly, greatly reducing effective range. -
Tech X: Incubus shoots small, fixed-size Tech X laser rings, with a very slightly longer minimum charge than Isaac.
In-game Footage
Trivia
- In folklore, incubi are evil spirits said to descend upon sleeping people, specifically ones fabled to have sexual intercourse with women during their sleep, or, more simply put, the male version of a succubus.
- If playing with a controller, you will notice the shooting deadzone for the incubus is smaller than Isaac's.
